Patent GB-1351512-A (GB)
Title: Locking device
IPC: A01D43/10
Filed: 1971-04-19
Abstract: 1351512 Harvesting machines INTERNATIONAL HARVESTER CO 19 April 1971 [5 Feb 1970] 21026/71 Headings A1F and A1P In a tractor drawn mower conditioner, Fig.  1, having a header 57 which is pivoted to a  wheeled frame 3 by stub axles 53, 54 and is  raised and lowered through lost motion coupling 150, 197 by rotation of arms 199 fixed to rock shaft 200. (see Fig. 2), the header is retained in the raised transport position by a pin 22 engaging slots 219 in arms 205 fixed to rock shaft 200 and slot 220 in anchor member 222 on frame 7, the slots being of sufficient length and so positioned that the pin cannot be sheared when the header is raised to its fullest extent whether the pin is left in either one of the slots or through both (see Fig. 20). The rook shaft 200 is rotated by a hydraulic ram 215, Fig. 8, connected between draught member 5 of frame 3 and an arm 206 which is journalled on rock shaft 200 to engage an abutment 210 fixed between arms 205. The header is partly counterbalanced by springs 175, 176 connected between frame beam 7 and arms 179, 180 on the header. A lower conditioning roller 106 is journalled in the side plates 55, 56 of the header and an upper roller 105 is journalled in plates 126, 127 pivoted to the side plates and to lifting arms 130, 131 and is biased towards the lower roller against abutments 124 by springs 139 to leave a small gap. When the header is raised the upper roller remains against abutment 124 until pins 134 engage the ends of slots 133 in the lifting arms at which point it is raised to open the roller gap. A reel sweeps crop cut by reciprocating cutter bar 102 rearwardly over platform 58 to the rollers. The reel comprises dished circular plates 68, 69, 70 'between which are mounted via triangular plates 77 four to six tined bars 81 and corresponding bats 96 having rolled edges 97, 98. The angle of the tines is controlled as shown in Fig. 28 by rollers 88 on arms 87 running in cam track 98. A U-shaped crop deflecting bar 250, Fig. 22, is connected to side plates 55, 56 by mountings 254 which can be slackened to pivot about bolt 260 or to allow arms 252, 253 to slide through. A crop dividing bar 270 is connected to one end of bar 250 by adjustable clamp 289 and is supported by resilient V-shaped element 271 welded to it at 27 and bearing against bar 250. A tongue 15, Fig. 23, is pivoted to the tractor at 302 and to the draught member 5 at 16 and can be locked at different angles within the flared portion 12 of the draught  member by a spring loaded bolt 500 engaging  slots 507 in wall 508. The pin can be withdrawn by the tractor driver while seated by pulling cable 521 connected to lever 515 on which the bolt is pivoted. A guard 307 for the drive shaft from the p.t.o. of the tractor is fixed to the tongue 15 and pivoted to the frame 3 at 43. A one or two piece bumper 310, Fig. 25, formed from sheet metal is bolted round tongue 15 to prevent the guard 307 fouling the wheels of the tractor. The drive shaft from the traotor is connected to angled gears 377 to drive pulley 382 which drives bell shaped pulley assembly 384 via belt 383. A belt 389 from pulley 384 to pulley 391 drives the wobble drive 391 of the cutter bar. A chain 402 connected to pulley assembly 384 via an overrunning clutch 401 drives the lower roller 106 directly and upper roller 105 via another overrunning clutch 411. An idler 404 is connected by an arm 405 to plate 126 to maintain tension in the chain when the upper roller is raised. The chain also drives the reel pulley 427 via belt 427 which has an idler 422 adjusted by nut and bolt 426 through bell crank 423. The frame 3 is provided with tool box 30 and with a compartment 46, for a spare cutter blade, within frame beam 7 closed by a cover plate 612 pivoted on spring loaded bolt 614.